Ƙwaƙwalwar ƙwaƙwalwa ita ce ƙananan ɓangaren kwakwalwa wanda ke haɗa kwakwalwa zuwa kashin baya. Ita ce ke da alhakin sarrafa yawancin mahimman ayyukan jiki, kamar bugun zuciya, numfashi, hawan jini, da sani. Ƙwaƙwalwar ƙwaƙwalwa ta ƙunshi manyan sassa uku: medulla oblongata, pons, da tsakiyar kwakwalwa.
